【作者】 王林平； 张君； 马静静； 图布新； 郭伟； 袁倬斌；

【Author】 WANG Lin-ping~1,ZHANG Jun~(*1),MA Jing-jing~1,Tubshin Hreid~1,GUO Wei~2 and YUAN Zhuo-bin~3(1.College of Chemistry and Chemical Engineering,Inner Mongolia University,Hohhot 010021;2.College of Environmental and Resource Sciences,Inner Mongolia University,Hohhot 010021;3.College of Chemistry and Chemical Engineering, Graduate University of the Chinese Academy of Sciences,Beijing 100049)

【机构】 内蒙古大学化学化工学院； 内蒙古大学环境与资源学院； 中国科学院研究生院化学与化学工程学院；

【摘要】 实验发现以Nafion分散羧基化多壁碳纳米管修饰玻碳电极（Nafion-MWCNTs/NTs/GC）对咖啡因的电化学行为有明显的催化和增敏作用,基于此建立了一种高灵敏的电化学测定咖啡因的新方法。优化实验条件,本方法测定咖啡因的线性范围为4.7×10^-6～2.4×10^-4mol/L;检出限为5.0×10^-7 mol/L;相对标准偏差（RSD）为3.8%(n=5,c=5×10^-5-mol/L)。并对含咖啡因药片进行了测定,回收率为96.4%～103.3%。更多还原

【Abstract】 In the experiment we found that there was a very good catalytic and sensitizing effect of caffeine on Nafion-MWCNTs /GC electrode,based on it we established a new and high sensitivity method for detecting of caffeine.In the best experimental condition,the linear range of this method was from 4.7×10^-6～2.4×10^-4 mol/L,the detection limit was 5.0×10^-7 mol/L and the relative standard deviation（RSD） was 3.8%(n=5,c=5×10^-5 mol/L).The caffeine-containing tablets were determined and the recovery was 96.4%～103.3%.更多还原